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mmc: at91: add multi block read/write support. 

Since the at91sam9263, the mmc hardware support multi blocks read/write. So this driver enable it.

Signed-off-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Andreas Bießmann <andreas.devel@googlemail.com>
This commit is contained in:
Wu, Josh 2012-09-13 22:22:04 +00:00 committed by Andreas Bießmann
parent b9f4bc34ac
commit 1db7377a70
2 changed files with 17 additions and 1 deletions
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11
drivers/mmc/gen_atmel_mci.c
View File

@ -87,6 +87,11 @@ static void mci_set_mode(struct mmc *mmc, u32 hz, u32 blklen)
| MMCI_BF(BLKLEN, blklen)
| MMCI_BIT(RDPROOF)
| MMCI_BIT(WRPROOF)), &mci->mr);
/*
* On some new platforms BLKLEN in mci->mr is ignored.
* Should use the BLKLEN in the block register.
*/
writel(MMCI_BF(BLKLEN, blklen), &mci->blkr);
initialized = 1;
}
@ -183,6 +188,12 @@ mci_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd, struct mmc_data *data)
/* Figure out the transfer arguments */
cmdr = mci_encode_cmd(cmd, data, &error_flags);
/* For multi blocks read/write, set the block register */
if ((cmd->cmdidx == MMC_CMD_READ_MULTIPLE_BLOCK)
|| (cmd->cmdidx == MMC_CMD_WRITE_MULTIPLE_BLOCK))
writel(data->blocks | MMCI_BF(BLKLEN, mmc->read_bl_len),
&mci->blkr);
/* Send the command */
writel(cmd->cmdarg, &mci->argr);
writel(cmdr, &mci->cmdr);

7
include/atmel_mci.h
View File

@ -38,7 +38,7 @@ typedef struct atmel_mci {
u32 sdcr; /* 0x0c */
u32 argr; /* 0x10 */
u32 cmdr; /* 0x14 */
u32 _18; /* 0x18 */
u32 blkr; /* 0x18 */
u32 _1c; /* 0x1c */
u32 rspr; /* 0x20 */
u32 rspr1; /* 0x24 */
@ -118,6 +118,11 @@ typedef struct atmel_mci {
#define MMCI_TRTYP_OFFSET 19
#define MMCI_TRTYP_SIZE 2
/* Bitfields in BLKR */
/* MMCI_BLKLEN_OFFSET/SIZE already defined in MR */
#define MMCI_BCNT_OFFSET 0
#define MMCI_BCNT_SIZE 16
/* Bitfields in RSPRx */
#define MMCI_RSP_OFFSET 0
#define MMCI_RSP_SIZE 32